{"paper":{"title":"The GALAH survey and Gaia DR2: Linking ridges, arches and vertical waves in the kinematics of the Milky Way","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Boquan Chen, Daniel B. Zucker, Dennis Stello, Gayandhi M. De Silva, Jane Lin, Janez Kos, Jeffrey D. Simpson, Joss Bland-Hawthorn, Ken C. Freeman, Martin Asplund, Michael Hayden, Sanjib Sharma, Sarah L. Martell, Shourya Khanna, Sven Buder, Thor Tepper-Garcia, Tomaz Zwitter, Yuan-Sen Ting","submitted_at":"2019-02-26T18:40:31Z","abstract_excerpt":"Gaia DR2 has revealed new small-scale and large-scale patterns in the phase-space distribution of stars in the Milky Way. In cylindrical Galactic coordinates $(R,\\phi,z)$, ridge-like structures can be seen in the \\vphiR{} plane and asymmetric arch-like structures in the \\vphivR{} plane. We show that the ridges are also clearly present when the third dimension of the \\vphiR{} plane is represented by $\\langle z \\rangle$, $\\langle V_z \\rangle$, $\\langle V_R \\rangle$, $\\langle$[Fe/H]$\\rangle$ and $\\langle[\\alpha/{\\rm Fe}]\\rangle$. The maps suggest that stars along the ridges lie preferentially clo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.10113","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1902.10113/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}